Specifications:

• Frequency response: 20 Hz to 20KHz
• Transducer principle: Dynamic driver
• Transducer size: 6mm
• Sound pressure level(SPL): 102dB±3dB
• Impedance: 32
• Version: Bluetooth 5.2
• Transmission frequency: 2.402 GHz to 2.480 GHz
• Profiles: HSP, HFP, AVRCP, A2DP
• Codec: SBC
• Effective Range: Line of sight approx. 30ft (10m)
• Power supply
  • built-in Lithium rechargable batteries, 3.7V
  • left earbud:35mAh
  • right earbud: 35mAh
  • charging case: 300mAh
• Operating time
  • 5hrs (music playback via A2DP) with rechargeable batteries of the earphones*
  • 24hrs with rechargeable battery of the charging case*
• Charging time
  • Earphones: approx. 1.5 hours
  • Charging case: approx. 2 hours
  • *Charging case that holds multiple charges for having the total play time. Battery life depends on device settings, environment, usage and many other factors.